4. Boring or penetrating the earth
  5. Processes
  6. Boring curved or redirected bores

Curtis E. Leitko, Jr.

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Controlled directional drilling system and method

Boring or penetrating the earth – Processes – Boring curved or redirected bores
Patent

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Coring tool

Boring or penetrating the earth – With means movable relative to tool to receive – retain – or... – Core-retaining or severing means
Patent

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Earth boring apparatus and method with control valve

Boring or penetrating the earth – Boring without earth removal
Patent

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Orienting and circulating sub

Boring or penetrating the earth – With signaling – indicating – testing or measuring – Tool position direction or inclination measuring or...
Patent

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Profile ID: LFUS-PAI-P-38200

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